Electrical testing instrument



FIG. 1 is a front elevational view of the electrical testing instrument showing my new design, the cord broken away indicating indeterminate length;

FIG. 2 is a top plan view of the upper portion of the instrument of FIG. 1, the lower symmetrical portion being omitted for ease of illustration and the bottom plan being a mirror image thereof; and

FIG. 3 is a left end elevational view thereof. 

The ornamental design for an electrical testing instrument, as shown. 